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<head><meta charset="utf-8"><title>rustc is crashing on syn · t-compiler/performance · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/247081-t-compiler/performance/index.html">t-compiler/performance</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/247081-t-compiler/performance/topic/rustc.20is.20crashing.20on.20syn.html">rustc is crashing on syn</a></h3>

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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/247081-t-compiler/performance/topic/rustc%20is%20crashing%20on%20syn/near/232475784" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Joshua Nelson <a href="https://rust-lang.github.io/zulip_archive/stream/247081-t-compiler/performance/topic/rustc.20is.20crashing.20on.20syn.html#232475784">(Mar 30 2021 at 18:40)</a>:</h4>
<p><a href="https://perf.rust-lang.org/status.html">https://perf.rust-lang.org/status.html</a></p>
<blockquote>
<p>thread 'rustc' panicked at 'found unstable fingerprints for evaluate_obligation(e3352ed64d6e2ccd-c82ee1c6b3ce2c20): Ok(EvaluatedToOk)', /rustc/16156fb2787f745e57504197bd7fe38b69c6cbea/compiler/rustc_query_system/src/query/plumbing.rs:593:5</p>
</blockquote>
<p>cc <span class="user-mention" data-user-id="125294">@Aaron Hill</span> - I think this is because of <code>-Z verify-incr-ich=yes</code>?</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/247081-t-compiler/performance/topic/rustc%20is%20crashing%20on%20syn/near/232475879" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Joshua Nelson <a href="https://rust-lang.github.io/zulip_archive/stream/247081-t-compiler/performance/topic/rustc.20is.20crashing.20on.20syn.html#232475879">(Mar 30 2021 at 18:41)</a>:</h4>
<div class="codehilite"><pre><span></span><code>query stack during panic:
#0 [evaluate_obligation] evaluating trait selection obligation `quote::Tokens: std::marker::Unpin`
#1 [is_unpin_raw] computing whether `quote::Tokens` is `Unpin`
end of query stack
</code></pre></div>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/247081-t-compiler/performance/topic/rustc%20is%20crashing%20on%20syn/near/232475995" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Aaron Hill <a href="https://rust-lang.github.io/zulip_archive/stream/247081-t-compiler/performance/topic/rustc.20is.20crashing.20on.20syn.html#232475995">(Mar 30 2021 at 18:42)</a>:</h4>
<p>Yes, this is <a href="https://github.com/rust-lang/rust/issues/83538">https://github.com/rust-lang/rust/issues/83538</a></p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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